Application of adhesive substances to textile fabrics and the like.



UNITED STATES PATENT OFI IGE.

FRITZ HESSE, OF DRESDEN, GERMANY, ASSIGNOR TO THE FIRM OF DEUTSCHE KUNST- LEDER AKTIEN-GESELLSCHAFT, 0F KCTITZ, NEAR COSWIG, GERMANY.

APPLICATION OF ADHESIVE SUBSTANCES T0 TEXTILE FABRICS AND THE LIKE.

No Drawing.

Specification of Letters Patent.

Applicationfiled November 13, 1911.

To all whom it may concern:

Be it known that I, FRITZ HESSE, a subject of the King of Prussia, residing at Strehlenerstrasse, Dresden, Germany, have invented new and useful Improvements in and Relating to the Application of Adhesive Substances to Textile Fabrics and the Like, of which the following is a specification.

v This invention relates to the method of cementing together lengths of fabrics by means of, or coating fabrics with, an adhesive substance applied in a finely divided or powdered condition, and more particularly to the manufacture of artificial leather by means of a coating of powdered-nitrocellulose or celluloid applied to a suitable fabric.

The cementing together of two continuous lengths of material by means of an adhesive substance applied in powdered formhesive substance is applied is damped or saturated with the solvent, thus giving an unnecessary consumption and loss of solvent and in some cases damaging the material to which the adhesive is applied.

In carrying this invention into effect the above indicated disadvantages are avoided, as the powdered adhesive applied to the material is dissolved by means of a thin solution of the same or other suitable adhesive substance.

.- I will describe my improved process as applied to the production of artificial leather, from which description its application for the production of other materials will be understood. Leather so produced has the advantage of being provided, simultaneously with the bringing into solution of the applied adhesive substance, with a layer of varnish, while in the ordinary method at present employed of applying the solvent in the condition of gas or vapor, the required layer of varnish must be subsequently applied.

In preparing artificial leather from one or several breadths of fabric, celluloid or nitro-cellulose in powder form is-according to the present invention-applied either by hand or in some mechanical way upon pr between the unmoistened breadths of fabric which are to be coated. As solvent of the adhesive one may use acetone, for instance, which, by a slight addition of celluloid or of nitro-cellulose, is concentrated to such an extent as to attain a consistency approximately between that of the thin mineral oil and that of castor-oil. By this concentration of the solvent after application to the fabric, a too rapid permeation and an excessive saturation of the breadth of the fabric is avoided.

It is the essential feature of this invention that the solvent for the applied powdered adhesive substance is itself a thin solution of either the same adhesive substance or other suitable adhesive, as solvents when applied by themselves to dissolve the powdered adhesive substance at once, in consequence of their extreme fluidity and penetrating powers, saturate or damp the fabric and deteriorate the final product and causeloss of adhesive substance.

The content of celluloid or other adhesive in. the thin solutions may be very small, as the desired object maybe attained if such solution, which acts to dissolve the applied powdered adhesive substanceQhis the viscosity of mineral oil or of castor oil.

By the improved treatment of the applied powdered adhesive substance the artificial leather takes up only a small quantity of liquid compared with the quantity of substance. After the substance has been brought into its dissolved state the solvent is evaporated in the known manner.

Having now particulariy described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is L 1. A process for preparing artificial leather from one or several breadths of fabric which consists in applying adhesive substances in powder form upon or between the dry breadths of fabric and dissolving the adhesive substances by treating them with an appropriate solvent which has been the consistency of oil by a slight addition brought to the consistency of oil by a slight of celluloid. addition of adhesive substances. In testimony whereof l have signed my 2. A process for preparing artificial .name to this specification in the presence of 5 leather from one or several breadths of fabtwo subscribing witnesses.

rie which consists in applying celluloid in powder form upon or between the dry FRITZ HESSE' breadths of fabric and dissolving the cellu- Witnesses:

loid powder by treating it with an appro- PAUL AREAS,

10 priate solvent which has been brought to ARTHUR GUBE. 

